<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        function Foo() {
            getName = function() {console.log(1)}
            return this
        }
        Foo.getName = function() {console.log(2)}
        Foo.prototype.getName = function() {console.log(3)}
        var getName = function() {console.log(4)}
        function getName() {console.log(5)}

        Foo.getName() // 2
        getName() // 4
        Foo().getName() // 1
        getName() // 1
        new Foo.getName() // 2
        new Foo().getName() // 3
        new new Foo().getName() // 3
        const res =  new function() {console.log(3)}
    </script>
</body>
</html>